mirror of
https://github.com/reactos/reactos.git
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110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2000 David Welch <welch@cwcom.net>
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*
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* Moved to MSVC-compatible inline assembler by Mike Nordell, 2003-12-26
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* FILE: ntoskrnl/ke/i386/vm86_sup.S
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* PURPOSE: V86 mode support
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* PROGRAMMER: David Welch (welch@cwcom.net)
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* UPDATE HISTORY:
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* Created 09/10/00
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*/
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/* INCLUDES ******************************************************************/
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#pragma hdrstop
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#include <ddk/ntddk.h>
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#include <ddk/status.h>
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#include <internal/i386/segment.h>
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#include <internal/i386/fpu.h>
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#include <internal/ps.h>
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#include <ddk/defines.h>
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#include <internal/v86m.h>
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#include <ntos/tss.h>
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//#include <ntos/service.h>
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#include <internal/trap.h>
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#include <internal/ps.h>
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#include <roscfg.h>
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#include <internal/ntoskrnl.h>
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#include <internal/i386/segment.h>
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void KeReturnFromSystemCall();
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/*
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* FUNCTION: KeStackSwitchAndRet
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* PURPOSE: Switch to a new stack and return from the first frame on
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* the new stack which was assumed to a stdcall function with
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* 8 bytes of arguments and which saved edi, esi and ebx.
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*/
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__declspec(naked)
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VOID STDCALL
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KeStackSwitchAndRet(PVOID NewStack)
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{
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__asm
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{
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push ebp
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mov ebp, esp
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cli
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mov esp, NewStack
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sti
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pop edi
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pop esi
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pop ebx
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pop ebp
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ret 8
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}
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}
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__declspec(naked)
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VOID STDCALL
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KePushAndStackSwitchAndSysRet(ULONG Push, PVOID NewStack)
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{
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__asm
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{
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push ebp
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mov ebp, esp
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push ebx
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push esi
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push edi
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cli
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push 8[ebp]
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mov ebx, fs:KPCR_CURRENT_THREAD
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mov KTHREAD_CALLBACK_STACK[ebx], esp
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mov esp, 12[ebp]
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sti
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push 0
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call KeLowerIrql
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jmp KeReturnFromSystemCall
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}
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}
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